Bumping gaia.json for 2 gaia-central revision(s)

========

https://hg.mozilla.org/integration/gaia-central/rev/cc16386c4f97
Author: Dale  Harvey <dale@arandomurl.com>
Desc: Merge pull request #10592 from daleharvey/879881

Bug 879881 - Add ability for activities to define maximum file size for video recording. r=djf

========

https://hg.mozilla.org/integration/gaia-central/rev/6c2c0e5b0a18
Author: Dale Harvey <dale@arandomurl.com>
Desc: Bug 879881 - Add ability for activities to define maximum file size for recorded videos